We found that out last year when an unvaccinated teen returned from a trip overseas and developed measles.

“Although patient A’s parents had chosen not to vaccinate him, his immunocompromised brother, an organ transplant recipient, had received intravenous immunoglobulin to protect him against measles before traveling overseas. When patient A’s illness was reported, SCCPHD recommended that his brother receive additional intravenous immunoglobulin and be quarantined 7 additional days; the family followed both recommendations. Patient C’s unvaccinated sister, aged 17 years, received parental permission to choose to receive MMR vaccine when her brother was quarantined; she opted to receive the vaccine.”

Notes from the Field: Measles Outbreak in an Era of Stricter Immunization Requirements — California, March 2018

While that isn’t so surprising, it is that instead of cooperating with health department investigators, so that they can find and quarantine contact, several people lied. That led to more people getting sick and the outbreak going on longer than it should have.

It is also amazing that they hadn’t already vaccinated their kids, having a high risk, immunocompromised child in the house who couldn’t receive the MMR vaccine!